Gelation of Solvate Ionic Liquid by Self-Assembly of Block Copolymer and Characterization as Polymer Electrolyte

被引：75

作者：

Kitazawa, Yuzo ^{[1
]}

Iwata, Kaori ^{[1
]}

Imaizumi, Satoru ^{[1
]}

Ahn, Hyungmin ^{[2
]}

Kim, Sung Yeon ^{[2
,3
]}

Ueno, Kazuhide ^{[1
]}

Park, Moon Jeong ^{[2
,3
]}

Watanabe, Masayoshi ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[2] Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Div Adv Mat Sci, Pohang 790784, South Korea

来源：

MACROMOLECULES | 2014年 / 47卷 / 17期

基金：

新加坡国家研究基金会; 日本学术振兴会;

关键词：

AMORPHOUS CONCENTRATED LIQUID; TRANSPORT-PROPERTIES; PHYSICOCHEMICAL PROPERTIES; TRIBLOCK COPOLYMER; VINYL MONOMERS; LITHIUM SALT; GELS; CONDUCTIVITY; DIFFUSION; TRANSITION;

D O I：

10.1021/ma501296m

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We report a new class of polymer electrolytes that exhibit high Li+-ionic conductivity and thermal stability up to 200 degrees C. The polymer electrolyte consists of a solvate ionic liquid ([Li(G4)][TFSA]), comprising an equimolar mixture of lithium bis(trifluoromethanesulfonyl)amide (Li[TFSA]) and tetraglyme (G4), and a well-defined ABA-triblock copolymer, polystyrene-b-poly(methyl methacrylate)-b-polystyrene (PSt-b-PMMA-b-PSt, SMS). The electrolyte is formed by the self-assembly of SMS, where the solvatophobic PSt segments serves as physical cross-linking points, and the solvatophilic PMMA segment with preferentially dissolved [Li(G4)][TFSA] forms ion-conduction paths. In the electrolyte, the preservation of the complex cation [Li(G4)](+) in the PMMA phase was demonstrated by pulsed-field gradient spinecho (PGSE) NMR, Raman spectra, and thermogravimetric analysis. Because of the preservation of [Li(G4)](+), which hinders the direct interaction of Li+ with the polymer segment and the coupling of the ionic transport from the segmental motion, the room temperature ionic conductivity of the electrolyte reached an appreciable level (10(4)10(3) S cm(1)).

引用

页码：6009 / 6016

页数：8

共 63 条

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